Ignition-dynamo.



o. T. MASON.

IGNITION DYNAMO.

APPLICATQON FILED JULY 29, 1913.

1,165,374, 7 Patented Dec. 21, 1915 W wi/tueoo zo "HM-mm:

STATES PATENT QFFICE.

GEAIRLES THOMAS MASQN, OF SUMTEE, SOUTH CAROLINA, ASSIGIT OR, BY MESNE ASSEGNMENTS,

TQ SELI'EDORF ELECTRICAL COMPANY, OF NEWARK,

NEW

IGNITEON-DYNAMO.

Application filed July 329, 1913.

To aZZ whom it may concern Be it known that I, Crrannns Tnounxs MAson, a citizen of the United States, residing at Sumter, in the county of Sumter 5 and State of South Carolina, have invented certain new and useful improvements in Ignition-Dynamos, of Which the following is a specification, reference being had to the accompanying drawin 10 This invention relates to dynamo machines, and particularly to those used for ignition purposes, and the objectis to provide means whereby the intensity of spark can be regulated so that it Will not 15 becoine excessive at high speeds.

Ancillary objects are; to enable the in tensity of the spark to he vared Without varying the timing therecu in relation to the r and to increase the efficiency of the us in various Ways which Will be er pointed out.

n rention is illustrated in the accoinin which he figure ion, of

neto ha r" the gene, 2

Such machine is carrying eyed,

y per ling application Ser" filed November 2' 1912, Q

cruction proper "iaterial, 7i sl same sui ciently only to i]. is practic 9 supported such a Way A able about its support.

structur 2 is Specification of Letters Patent.

, only the interrupter mechanism as is done,

Patented Deca 21, 1915;:

Serial no. 781,840.

armature structure may also be varied, as shown by the dotted lines, New in inagnetos of this character, without the independently movable interrupter, the spark is of an intensity varying according to the timing. The timing is accomplished by moving to the structure carrying the Winding and interrupter mechanism; hence it the magneto is driven at a high rate of speed as is often the case when used on motorcycles or racing automobiles, the spark is of such intensity that the spark plug points are fused, or heated to such a degree that pre-ignition results. This could be obviated by having the field structure stationary and moving $71") in the case of shuttle Wound armature machines, but such an expedient results in a weakened spark at either the advance or retard position of the spark, depending upon the position of the interrupter in re- 2 la tion to the peak of the current Wave range of timing is also limited. M plish the desired result by mov to advance or retard the i anism and, after same is operly so justed, thereby tirnl the ign in to the engine} employ link 10 to move the arms ture or coil structure in relation to rotor and the interrupter contacx vary the intensity of the spark. not alter the timin x Links 10 a. be operated independ 2 although a more convenient ar to provide a common opera which is fixed at one end 13, it being relatively so attached t structure 2 is advanced terrupter casing 9, so that While J; rupter casing advances say 12 o rees, the armature structure advances l5 spark being Weake in inten difference in the relative posi 1 members. WVhen the links 19 I independently operative, it will he noted that the intensity of the spark he varied Without varying the tnne llLQ in l tion to the engine, e intensity of spark being regulated by the the armature structure control a l 10, While the timi g is control opening of the interrupter contacts on, ried' by the casing '9, "t

is controlled by l r the and 11 are connected to a common lever 12 the intensity of the spark is maintained the same for a given advance over a certain range at a given speed.

it is obvious to those skilled in the art that the lever 12 may be the ordinary ad- Vance and retard lever (or as it is commonly called the spark lever) which is ordinarily used to control the position of the interrupter casing 9 thereby varying the timing of the magneto. But with the type of magneto having a movable armature structure the timing lever would ordinarily be connected to the armature structure which would also carry the interrupter casing 9 which would move with it. It will be seen, however, that my invention consists broadly of means for varying the timing of the generated wave of electromotive force and at the same time varying the position of the interrupter mechanism in relation thereto, each means being movable independently of the other or both being movable together and bearing a determined relation to each other for the purposes setforth.

Having thus described my invention What i claim and desire to secure by Letters Patent is 1. An ignition dynamo comprising a fixed primary field structure, an adjustable secondary structure carrying a generator coil, driven means for transferring the flux from the'primary field to the secondary structure alternately, an interrupter controlling the circuit of the generator C011, and means for differentially simultaneously adjusting the secondary structure and the interrupter, as and for the purpose intended, substantially as described.

2. An ignition dynamo comprising a fixed primary field structure, an adjustable secondary structure carrying a generator coil,

driven means for transferring the flux from the primary field to the secondary structure alternately, an interrupter controlling the circuit of the generator coil, and adjusting means for said secondary structure and interrupter with positive interconnections between said parts to produce a differential rate of movement thereof, as and for the purpose intended, substantially as described.

3. An ignition dynamo comprising a fixed primary field structure, an adjustable secondary structure carrying a generator coil,

driven means for transferring the flux from the primary field to the secondary structure alternately, an interrupter controlling the circuit of the generator coil, and a lever for adjusting the said secondary structure and interrupter, with links connected to said parts at one end, and connected to separate points on the lever for differential movement thereby and therewith, as and for the purpose intended, substantially as described.

-' In an i nition dynamo, a primary tion of the first means to adjust the interrupter toward or away from the peak of the wave, to increase or diminish the relative intensity of the spark according to the direction of the adjustment.

5. The-method of regulating the intensity of the spark in an ignition system, which consists in producing a differential simultaneous adjustment of the time of current peak, and the time of circuit interruption, as and. for the purpose intended, substantially as described.

6. The method of timing the spark in ignition systems, which consists in regulat ing, the angular relation between the secondary or induced member of the system and the primary or inducing member, and at the same time limiting the intensity by progressively and proportionately adjusting the point on the electromotive force wave or current wave at which discharge will take place.

7. The method of timing and regulating the sparking current in an ignition system, which consists in determining the time of maximum intensity by adjusting the relation between the primary or inducing member and the secondary or induced member of a generating unit, and simultaneously determining the point of discharge, with relation to the point of maximum intensity, whereby the two may be made to diverge or coincide at will.

8. In an ignition dynamo, an exciting field, a generating wlnding, a rotor by means of which flux from the exciting field is shifted in said generating winding to linemen 8 adjustable ignition controlling mechanism, means for shifting the said member Within n range greater than the possible range of adjustment of the controlling mechanism and means for ncljustnhly shining the controlling ninechenism.

10. ignition apparatus for internal combustion engines on electric generator having o member capable of adjustment for regulating the generator phases, shiftnbly adjustable ignition controlling mechanism, means for ntljustalny shii'ting; toe said i i her at one rate of progression rehrti the engine, and means for shifting the controlling mechanism at n diiterent progressive rate.

11. In ignition apparatus for internzii combustion engines, en electric generator he ing a member capable of adjustment for regulating the generator phases shiftnhly adjustable ignition cont ling merhmnsnn means for adjustn'hly shin rig the said memher at one rate of speed W1 1 respect to the engine, and means for shifting the controlling mechanism at a proportional tlifi'erential progressive rate.

12. In ignition apparatus for internal combustion engines" {U1 electric generator having a member capable of adjustment for regulating the generator phases; shiftnbly adjustable ignition controlling mechanism, means for shifting the said member 2i range greater than the possible range of adjustment the controlling mechanism, and means for ecljustably shifting the con trolling mechanism at a rate proportional to the adjustable movement, of the said member.

13. In ignition apparatus for internal comuhstion engines an electric generator having :1 member capable of adjustment for regulating the generator phases, means for mijustzihly shifting the said member, shift able ignition. controlling: mechanism including a Contact actuating device movable upon adjustment of the said generator member: and means for also effecting shifting of the centre? mechanism.

In in apparatus for internal eombustion engines an electric generator having a 111931158X capable of adjustment for reouiating the generator phases, shiftahle rmjustnhle iition controlling mechanism, and common means for so adjustably shiftin; the snhl member and the controlling ineeimnism as to cause one to he moved at a predetermined rate of progression, and the other ut e rlifi'erential rate of movement.

In testimony whereof hereunto zitiix my signature in the presence or" two Witnesses.

CHARLES THOMAS MASON. il itnesses M 

